On our garden irrigation system we had to sand down an old PVC pipe, which had swollen from age, to accept a new union, but we now have a leak at that new union. We used the purple solvent and PVC cement recommended and all other unions are fine. There's not enough room to cut it out, so we have to find a way to fix that leak. Any ideas? It's in the pipe coming out of the pump, so there's up to 60 pounds of pressure on it.